Finding the Fourth Proportional to 71,144.50, 98,178.04 and 39,312.71

Step by Step Solution

1. Step 1: Write the proportion equation
   71,144.50 : 98,178.04 = 39,312.71 : x
2. Step 2: Convert to fraction form
   71,144.50/98,178.04 = 39,312.71/x
3. Step 3: Cross multiply
   71,144.50x = 98,178.04 × 39,312.71
4. Step 4: Simplify right side
   71,144.50x = 3,859,644,814.89
5. Step 5: Solve for x
   x = 3,859,644,814.89/71,144.50
6. Step 6: Final answer
   x = 54,250.78